patch 9.0.0949: crash when unletting a variable while listing variables
Problem: Crash when unletting a variable while listing variables.
Solution: Disallow changing a hashtable while going over the entries.
(closes #11435)
diff --git a/src/testdir/test_autocmd.vim b/src/testdir/test_autocmd.vim
index aa204c4..a0d83ec 100644
--- a/src/testdir/test_autocmd.vim
+++ b/src/testdir/test_autocmd.vim
@@ -2326,6 +2326,28 @@
call StopVimInTerminal(buf)
endfunc
+func Test_autocmd_CmdlineLeave_unlet()
+ CheckRunVimInTerminal
+
+ let lines =<< trim END
+ for i in range(1, 999)
+ exe 'let g:var' .. i '=' i
+ endfor
+ au CmdlineLeave : call timer_start(0, {-> execute('unlet g:var990')})
+ END
+ call writefile(lines, 'XleaveUnlet', 'D')
+ let buf = RunVimInTerminal('-S XleaveUnlet', {'rows': 10})
+
+ " this was using freed memory
+ call term_sendkeys(buf, ":let g:\<CR>")
+ call TermWait(buf, 50)
+ call term_sendkeys(buf, "G")
+ call TermWait(buf, 50)
+ call term_sendkeys(buf, "\<CR>") " for the hit-enter prompt
+
+ call StopVimInTerminal(buf)
+endfunc
+
function s:Before_test_dirchanged()
augroup test_dirchanged
autocmd!